My favorite is Bog king from Strange Magic - Has a song talking about how evil he is. But all he does is prevent the spread of dangerous mind control magic, and quarantine people under the effects of said magic. Yes he greatly annoys people doing so, but honestly? If I get hit by a love potion, please quarantine me.
I Scream from Chikn Nuggit.
Claims to be the epitome of darkness; was exiled from Hell for falling in love with an Angel named Fwench Fwy.